Final answer:
The first component inserted into an assembly is the base or grounded component, which serves as the foundation for subsequent parts in CAD software.
Step-by-step explanation:
The first component that you insert into an assembly will always be referred to as the base component or grounded component. This is because in most assembly modeling in CAD (Computer-Aided Design) software, the first part placed sets the foundation for the rest of the assembly. All other parts are positioned in relation to this initial component. It is important that this base component is chosen carefully as subsequent components may depend on its correct positioning for the assembly to function correctly.